RFX Motorcycle crown Fantic XEF 310 [310]/Yamaha WR 125 Z [125]

The RFX Pro Series Hi-Carbon Steel (HCS) sprockets are perfect for riders looking for durability and good value for money in their sprockets, while offering an authentic quality that can't be found anywhere else.
High carbon certified steel provides unbeatable wear properties and its high strength compared to mild steel allows for a lighter profile, meaning the weight increase compared to aluminium is kept to a minimum.
The RFX HCS sprockets are laser cut for more precision and tighter tolerances.

Features

• High carbon certified steel
• CNC laser cutting.
• CAD designed profile for enhanced lightness.
• Mud evacuation grooves to reduce wear.
• Stiff design increases torsion resistance.
• Tighter tolerances improve performance.

Installation instructions:

• Start by placing the motorcycle on a stand, with the rear wheel raised off the ground.
• Remove the chain and the rear wheel from the motorcycle.
• While holding the hex key, loosen the nuts using an adjustable wrench.
• Remove all nuts and the worn sprocket.
• Clean the area around the hub, ensuring it's clean and free of debris.
• Take the new sprocket and place it on the hub, making sure it fits well and the bolt holes are positioned correctly.
• Clean the bolts and nuts of the sprocket.
• Apply blue Loctite to each bolt and insert them into the holes.
• Screw the nuts onto the bolts by hand, ensuring the seals are intact and in good condition.
• Hold the hex key in place and tighten the nuts evenly.
• Tighten the nuts and bolts according to the user manual.
• Reinstall the wheel on the motorcycle, ensuring the chain is aligned and tightened as per the manufacturer's specifications.

Specifications:

• colour: Silver
• material: Steel
• v-colour: Silver
• weight (g): 500
• width (mm): 315
• height (mm): 20
• length (mm): 305
• volume (cm³): 1922
• chain pitch: 520
• sprocket version: Standard
• v-number of teeth: 48 teeth
• number of teeth (sprocket): 48